I am one of those calibre users that is totally clueless about most of its functions and capabilities. Most of it is like a different language to me.
But I love that even for someone like me, its easy enough to figure out.
I just stick to the basics and hope nothing breaks on my computer, so I don't have to figure out again how in the world I got stuff like plugins to work.
So thanks to keeping it accessible to the simpler and basic users. I wouldn't know how to back up and properly sort my books without it.